Bit of a skinflint, endlessly mean (6)
I believe the answer is:
intend
'mean' is the definition.
('intend' can be a synonym of 'mean')
'bit of a skinflint endlessly' is the wordplay.
'bit of' indicates the answer is hidden within the clue.
'INTEND' is hidden in the letters of 'skinflint endlessly'.
(Other definitions for intend that I've seen before include "Mean (to do something)" , "Mean; aim" , "Signify" , "1 dn [DESIGN]" , "Mean - purpose" .)